where is configured how an app will auto restart?

For ex, i know several apps that i have stopped will auto restart exactly at 00:00h everyday, making it lag horribly or even crash any game i am playing, what severily degrades my android realm user experience. Others will instantly restart like the nosy weather app. Others start when wifi connects, when the screen still locked wakes up, like watzap and gmail. but Others i cant guess, like the useless email server (as i use gmail app), or chrome, and a few others. I could still try to uninstall a few of these, but others are really useful and i dont want to. If there could have a way to tweak this auto-android-messing feature, so that it could be suspended while i play games, my android realm user experience could greately improve and i would be happier again. Any tips? Android 6.0.1 sm-j700m